Delayed hospitalization increases mortality in displaced femoral neck fracture patients

Figures & data

Table 1.  Means and t-test results of hemoglobin values, potassium values, urea values, age, and ASA grades, comparing patients who arrived at hospital before or later than 6 hours after fracture.

Variables	Admitted before 6 hours (n = 132)	Admitted later than 6 hours (n = 133)	p-value
Age, years (SD)	75 (11)	76 (11)	0.5
ASA grade (SD)	2.3 (0.6)	2.4 (0.6	0.1
Hemoglobin, g/L (SD)	131 (17)	124 (21)	0.004
Potassium, mg/L (SD)	4.2 (0.5)	4.2 (0.5)	0.9
Urea, mg/L (SD)	7.0 (2.4)	8.2 (3.5)	0.002

Table 2.  Relative risk of death within 1 year. Cox regression analysis.

	RR	CI	p-value
Women (reference: men)	0.5	0.3–1.0	0.06
Age (change in risk for each year in increased age)	1.1	1.0–1.1	< 0.001
Arrival within 6 hours (reference: arrival later)	0.4	0.2–0.8	0.01
Surgery within 7 hours of arrival (reference: surgery later)	0.7	0.4–1.5	0.9
Osteosynthesis (reference: THA)	1.4	0.6–3	0.4

RR: relative risk; CI: 95% confidence interval.